Answer:
x = 0
Step-by-step explanation:
First we set up our equation. From the picture we can see that:
11 + x + 1 = 2x + 12
Now we can gather our like terms:
x + 12 = 2x + 12
Lets subtract x from both sides to isolate the x on the left:
12 = x + 12
Next we subtract 12 from both sides
x = 0
Check the answer
11 + 0 + 1 = 2(0) + 12
12 = 0 + 12
12 = 12
There should be a typo in the question: the correct formula would be
Let's compute 
first. We have
If we intersect this set with X, we have
So, that would be the left hand side. For the right hand side, we have
And their union is again 
1. 3x³-2x²+1x
2. 6y⁴+2y³-8y
3.-3m³-12m²+3m
4. 4d⁴-3d³+d²
5. -w⁵-3w³
6. -a⁴-3a³
(–2) + 6 + 1 = 1 + 6 + (–2) is B.Commutative Property
